Device for effecting complete combustion in furnaces.



PATENTBD SEPT. 11, 1906.

' R. WILDE.

DEVICE FOR EPFEGTING COMPLETE COMBUSTION IN FURNACES.

APPLICATION FILED SEPT.1.1904.

MUM

.combustion are conveyed and TED STATES PATENT. OFFICE.

RICHARD WILDE, OF TORONTO, ONTARIO, CANADA.

.To all whom it may concern:

Be it known that I, RICHARD WILDE,eI1 gineer, residi at the city of Toronto, in the county Qf I'Qrk, in the Province of Ontario, Canada have invented certain new and useful Im rovements in a Device for Effecting Compl ete Combustion in Furnaces,- being an improvement on my Canadian Patent No. 85,930,issued the 15th day of March, 1904; and I do hereby declare that the following is a full, clear, and exact description of the same.

The objects of my invention are to construct an apparatus to be arranged in combination with the boiler-setting, whereby I effect a complete combustionof the products that pass from. the furnace by returning them to the furnace the second time. The apparatus is so arranged that I do not introduce foreign elements into the furnace, thereby preventing the possibility of checking the combustion.

The device is so arranged that it collects from the stack and returns and distributes to several points in the furnace the unconsuined carbonous gases and at the same time at a temperature equal to that in the combustionchamber, so that they are in a state that they will readily be consumed.

I attain these objects by the apparatus as illustrated in the accompanying drawings, in which Figure 1 is a longitudinal sectional view, and Fig. 2 is a cross-sectional view, on lines a a, Fig. 1. Fig. 3 is a perspective detail of the perforated pipe and tubular connection.

'Like letters refer to like parts throughout the specification and drawings.

I show in the drawings, in combination with my invention, an ordinary boiler and boiler-setting, consisting of the boiler a, combustion-chamber b, brid e-wall c, ashpit d, grate-bars e, furnace j dead-plate g, fire-door h, back arch i, and stack j. Arranged in the back end of the combustionchamber 0 is a reservoir or chamber is, arranged to extend across the entire width of the combustion-chamber and may be built in of fire-bricks or consist of a metal boxing and into which the unconsumed roducts of om which they are distributed to the furnace.

Set on the back arch i of the boiler-setting is a rotary fan I. The fan may be of any convenient type, consistin of the usual fancasing and fan and provir ed with the usual Specification of Letters Patent. Application filed September 1, 1904. Serial Nd. 223.065

Patented Sept. 11, 1906.

drive shaft and pulley projecting at ri ht angles throu h the side. Extending para lel with the boi er a and communicating with the stack 1' and side face of the fan-casing is a tubular connection m, by which the unconsumed. products may be drawn into the fan.

Extending outwardly from the perimeter of the fan-casing, one from the top and one from the bottom, are two tubular branches n and n, which are bent at right angles and adapted to extend down the sides of the boiler-setting and enter into each end of the reservoir or chamber is and convey to the reservoir. the unconsumed products that are drawn by the fan from the stack through the tubular connection m. i

Extending from the front of the reservoir and through the upper part of the center of the bridge-wall is a discharge-pipe 0. The pipe 0 is set in the floor of the combustionchamber a and may be incased in fire-clay or set in fire-bricks to prevent it from burning out, and extending from the front of the reservoir and passing into the ash-pit near the bottom are two discharge-pipes p. The two discharge-pipes p are arallel with one another and are adapte to discharge one on each side of the ash-pit.

Set across the ash-pit beneath the gratebars and adjacent to the dead-plate gis a perforated pipe and coupled with each end of the perforate pi e g and extending downward and backward to the reservoir is are two feed-pipes r. The pipes 0, p, q, and r communicate with the reservoir and furnace f and are for the purpose of equally distrib uting the products of combustion drawn from the stack by the fan and forced by the fan into the reservoir and from the reservoir into the furnace.

Arranged in any convenient position in the tubular connection m is an oxygen-damper 8, through which air may be drawn into the fan and supplied to the reservoir along with the unconsumed products of combustion, and arranged in each of the downward-extending sections of the tubular branches n and n are dampers t and t, by which the amount of pressure may be regulated in the reservoir and from the reservoir to the fire.

Passing around the pulley uis a drive-belt c, which may be carried to any convenient means for deriving motion.

The operation is as follows: the unconsumed products of combustion are passing off through the stack they are sucked into the tubular connection mby the suction crer ated by the fan. They then pass throughthe fan-casing and are forced from the fan down through the branches n and n into the =reservoir or chamber 7c, and from thereservoir is they are distributed to the furnace through the discharge-pipes 0, p, and 1", respectively The fan is to be driven byany Suitable motive power and may be set to any desired speed. The fanalso draws in with the unconsumed products of combustion oxygen through'the damper s in the cornection m and forces all down into the reservoir.

It will be understood from the nature of the device the fan acts as afactor in supplying the reservoir and also acts as a means of pressure by which the products may be forced from the reservoir into the furnace.

What I claim as new, and desire to secure by Letters Patent, 157- 1. In combination with a furnace a device for the purpose specified, a reservoir-chamber, said reservoir-chamber suitably arranged in the combustion-chamber, dis.- charge-pipes leading from the. said reservoirchamber, said pipes communicating with-a perforated pipe, said perforated pipe ar ranged in the furnace; in close proximity with the grate-bars, discharge-pipes also leading from the said reservoir-chamber into the furnace, a rot'ary fan arranged to draw 7 the unconsumed products from the stack through a tubular connection, said tubular connection arranged between the stack and rotary fan, said fan arranged on the back arch of the said combustion-chamber, a tubular connection arranged between the stack and the side face of said fan, an air-inlet damper arranged in. the 'said'tubular connection, tubular conveying branches arran ed between the said fan and, reservoir-cham er, regulating-dampers arranged in the said conveying branches, discharge pipes leading from the reservoir into the furnace, a perforated pipe arranged in the said furnace, in close proximity to the grate-bars, feed-pipes communicating between the said reservoirchamber'and the said perforated pipe,'suit able means for operating the said rotary fan, substantially as specified.

Signed at Hamilton this 10th day of August,'1904. A

RICHARD WILDE. Witnesses:

JOHN' G. FARMER, Tnos. JACKSON. 

